Growth of infinite-layer (Sr,Nd)CuO2 films by MBE |
| |
Authors: | Y Krockenberger H Yamamoto |
| |
Institution: | NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan |
| |
Abstract: | Single phase, c-axis oriented infinite layer (IL) Sr1?xNdxCuO2 thin films were epitaxially grown on (1 1 0) DyScO3 substrates by molecular beam epitaxy (MBE). Electron impact emission spectroscopy (EIES) is the tool of choice for a stringent stoichiometry control which is essential for Sr1?xNdxCuO2 thin film preparation. As-grown films contain excess oxygen and therefore a reduction process is necessary to induce superconductivity. In the present study special attention was paid to the underdoped region since the optimization of the reduction process becomes more difficult for lower doping levels x. Sr0.95Nd0.05CuO2 films (underdoped) became superconducting with = 30 K and = 11.4 K after an annealing procedure. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|